Arrow keys not working after switching USB ports?

Your arrow keys stopped responding after you moved your keyboard to another USB port. The keyboard may be fine: the new port, a hub, a wireless receiver, or even the browser page could be the cause.

Test the keys outside the app where you noticed the problem, then compare ports and devices. The Keyboard Test checks whether the arrow-key presses reach the browser.

Test the arrow keys and USB ports

1. Open the Keyboard Test. Click in the test area so the page has focus, then press the Up, Down, Left, and Right arrow keys one at a time.
2. Press each key several times at a steady pace. Check whether every press registers, whether a key appears held down, or whether one direction is missing.
3. Reconnect the keyboard to the port that worked before, if available, and repeat the same presses. Then try another port directly on the computer, without a hub or dock.
4. If you use a wireless keyboard, connect its USB receiver to a different port and check the keyboard battery. Keep the keyboard and receiver close together while testing.
5. If possible, try another keyboard in the problem port, or try this keyboard on another computer. Change one thing at a time so the result is useful.

Arrow keys may scroll the page if the test area does not have focus. That does not by itself mean the keyboard is broken. Click the test area and try again. If the browser still does not show the key presses, compare the keyboard in a different browser or on another computer.

What the result means

All four arrows register on every port

The keys and ports can send input to the browser. The original app may have lost focus, use a different key binding, or have a setting that changes arrow-key behavior. Click inside that app and check its keyboard controls.

The keys work in the old port but not the new one

The keyboard is likely working, and the problem is tied to the new connection. A hub, dock, loose port, or USB receiver placement can interfere. Try a direct port and test other devices in the suspect port.

One arrow key fails on every port

This points more toward that key, the keyboard's internal connection, or its firmware than toward one USB port. Test it on another computer before deciding the keyboard needs repair.

No keys register in the test

Check the connection, receiver, and port first. If another keyboard works in the same port but yours does not, the original keyboard or its cable is the more likely cause.

The key appears to stay pressed or repeats unexpectedly

Disconnect and reconnect the keyboard, then press the key once more. If it keeps registering after you release it, test on another computer. A stuck key or keyboard fault is more likely if the behavior follows the keyboard.

How to fix it

1. Check focus and the app's controls. Click the window or page you want to use, then test the arrows again. In games or other apps, check whether the keys have been remapped or assigned to another action.
2. Reconnect the keyboard directly. Unplug it, wait a few seconds, and connect it to a different port on the computer rather than a hub, monitor, or dock. If the keyboard works only in one port, use that port for now.
3. Check the cable or wireless receiver. For a wired keyboard, make sure the cable and connector are not loose or damaged. For a wireless model, replace or charge the batteries, move the receiver to a clear port, and reconnect the keyboard according to its instructions.
4. Check keyboard accessibility settings. On Windows 11, open Settings › Accessibility › Keyboard and check whether Filter keys is on. On a Mac, open System Settings › Accessibility › Keyboard and check Slow Keys. These features can change how presses are accepted or delayed.
5. Restart the computer. This can clear a temporary USB or input problem. After restarting, connect the keyboard to the port you want to use and test the arrows before opening the app where the issue began.
6. Test another device in the suspect port. If several USB devices fail or disconnect there, the port or dock may be at fault. If only this keyboard fails and it also fails on another computer, the keyboard likely needs service or replacement.

When it's a keyboard or port fault

If an arrow key fails on multiple computers and USB ports, while other keys work, the keyboard itself is the likely cause. A key switch, internal connection, or keyboard circuit may be damaged. If the keyboard is under warranty, contact the seller or manufacturer. Otherwise, replacing a basic keyboard is often more practical than repairing it.

If multiple USB devices fail in the same port, avoid relying on that port. Try another port directly on the computer. If the problem continues across ports, or the connection drops when a plug is moved, arrange service for the computer or dock.

What a browser test can and can't tell you

The Keyboard Test reports which key presses reach the browser. It does not inspect the keyboard's internal switches or prove that a USB port is electrically healthy. A press that never appears could be caused by the keyboard, its connection, operating-system settings, or the page not receiving input.

That is why comparing the same keyboard across ports, then comparing a second keyboard in the same port, is more useful than repeatedly pressing the arrows in one place.